BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 0 PID: 31085 Comm: syz-executor.1 Not tainted 4.14.222-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 add_chain_cache kernel/locking/lockdep.c:2303 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:2415 [inline] validate_chain kernel/locking/lockdep.c:2435 [inline] __lock_acquire.cold+0x19a/0x97c kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:160 lock_hrtimer_base kernel/time/hrtimer.c:148 [inline] hrtimer_start_range_ns+0x77/0x10b0 kernel/time/hrtimer.c:955 hrtimer_start include/linux/hrtimer.h:377 [inline] perf_swevent_start_hrtimer kernel/events/core.c:8779 [inline] perf_swevent_start_hrtimer kernel/events/core.c:8762 [inline] cpu_clock_event_start+0x100/0x160 kernel/events/core.c:8837 cpu_clock_event_add+0x37/0x40 kernel/events/core.c:8849 event_sched_in+0x498/0xdb0 kernel/events/core.c:2134 group_sched_in+0xfb/0x400 kernel/events/core.c:2174 ctx_flexible_sched_in kernel/events/core.c:3199 [inline] ctx_sched_in+0x1303/0x1860 kernel/events/core.c:3245 perf_event_sched_in+0x69/0xa0 kernel/events/core.c:2332 perf_event_context_sched_in kernel/events/core.c:3285 [inline] __perf_event_task_sched_in+0x5a3/0x8c0 kernel/events/core.c:3324 perf_event_task_sched_in include/linux/perf_event.h:1087 [inline] finish_task_switch+0x3c9/0x610 kernel/sched/core.c:2664 context_switch kernel/sched/core.c:2811 [inline] __schedule+0x893/0x1de0 kernel/sched/core.c:3384 preempt_schedule_irq+0xb0/0x140 kernel/sched/core.c:3611 retint_kernel+0x1b/0x2d RIP: 0010:compound_head include/linux/page-flags.h:149 [inline] RIP: 0010:find_get_entry+0x112/0x630 mm/filemap.c:1371 RSP: 0018:ffff888096ce7488 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff02 RAX: 1ffffd40001b35c4 RBX: ffffea0000d9ae00 RCX: ffffc9000a6e9000 RDX: 00000000000018c5 RSI: ffffffff81681766 RDI: 0000000000000286 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000020012 R10: ffff8880b495cad8 R11: ffff8880b495c200 R12: ffff8880906d8dc0 R13: ffffea0001dfd6e0 R14: dffffc0000000000 R15: 0000000000000000 pagecache_get_page+0x53/0xab0 mm/filemap.c:1465 grab_cache_page_write_begin+0x63/0x90 mm/filemap.c:3005 block_write_begin+0x33/0x270 fs/buffer.c:2143 cont_write_begin+0x497/0x730 fs/buffer.c:2497 fat_write_begin+0x89/0x170 fs/fat/inode.c:222 generic_perform_write+0x1c9/0x420 mm/filemap.c:3055 __generic_file_write_iter+0x227/0x590 mm/filemap.c:3180 generic_file_write_iter+0x36f/0x650 mm/filemap.c:3208 call_write_iter include/linux/fs.h:1778 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x44c/0x630 fs/read_write.c:482 __kernel_write+0xf5/0x330 fs/read_write.c:501 write_pipe_buf+0x143/0x1c0 fs/splice.c:797 splice_from_pipe_feed fs/splice.c:502 [inline] __splice_from_pipe+0x326/0x7a0 fs/splice.c:626 splice_from_pipe fs/splice.c:661 [inline] default_file_splice_write+0xc5/0x150 fs/splice.c:809 do_splice_from fs/splice.c:851 [inline] direct_splice_actor+0x115/0x160 fs/splice.c:1018 splice_direct_to_actor+0x27c/0x730 fs/splice.c:973 do_splice_direct+0x164/0x210 fs/splice.c:1061 do_sendfile+0x47f/0xb30 fs/read_write.c:1441 SYSC_sendfile64 fs/read_write.c:1496 [inline] SyS_sendfile64+0x9b/0x110 fs/read_write.c:1488 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465ef9 RSP: 002b:00007f43c798a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465ef9 RDX: 0000000020000240 RSI: 0000000000000003 RDI: 0000000000000003 RBP: 00000000004bcd1c R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000007fff R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffcc40d3ccf R14: 00007f43c798a300 R15: 0000000000022000 sd 0:0:1:0: PR command failed: 134217730 sd 0:0:1:0: Sense Key : Illegal Request [current] sd 0:0:1:0: Add. Sense: Invalid command operation code sd 0:0:1:0: PR command failed: 134217730 sd 0:0:1:0: Sense Key : Illegal Request [current] sd 0:0:1:0: Add. Sense: Invalid command operation code sd 0:0:1:0: PR command failed: 134217730 sd 0:0:1:0: Sense Key : Illegal Request [current] sd 0:0:1:0: Add. Sense: Invalid command operation code XFS (loop0): Invalid superblock magic number sd 0:0:1:0: PR command failed: 134217730 sd 0:0:1:0: Sense Key : Illegal Request [current] print_req_error: 53 callbacks suppressed print_req_error: I/O error, dev loop0, sector 0 sd 0:0:1:0: Add. Sense: Invalid command operation code XFS (loop0): Invalid superblock magic number sd 0:0:1:0: PR command failed: 134217730 sd 0:0:1:0: PR command failed: 134217730 sd 0:0:1:0: Sense Key : Illegal Request [current] sd 0:0:1:0: Sense Key : Illegal Request [current] sd 0:0:1:0: Add. Sense: Invalid command operation code sd 0:0:1:0: Add. Sense: Invalid command operation code XFS (loop0): Invalid superblock magic number sd 0:0:1:0: PR command failed: 134217730 sd 0:0:1:0: Sense Key : Illegal Request [current] sd 0:0:1:0: Add. Sense: Invalid command operation code XFS (loop0): Invalid superblock magic number A link change request failed with some changes committed already. Interface syz_tun may have been left with an inconsistent configuration, please check. A link change request failed with some changes committed already. Interface syz_tun may have been left with an inconsistent configuration, please check. XFS (loop0): Invalid superblock magic number xt_l2tp: invalid flags combination: 0 A link change request failed with some changes committed already. Interface syz_tun may have been left with an inconsistent configuration, please check. A link change request failed with some changes committed already. Interface syz_tun may have been left with an inconsistent configuration, please check. A link change request failed with some changes committed already. Interface syz_tun may have been left with an inconsistent configuration, please check. IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready cannot load conntrack support for proto=3 IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready cannot load conntrack support for proto=3 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready cannot load conntrack support for proto=3 IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. encrypted_key: keyword 'new' not allowed when called from .update method caif:caif_disconnect_client(): nothing to disconnect caif:caif_disconnect_client(): nothing to disconnect